Geographically, Dar Sila is located in southeastern territory of the Republic of Chad.
Its capital is Goz Beïda which means in Arabic "the white sand dune".
According to Colonel Largeau, Commander in Chief of Goz Beida during the French invasion of Dar Sila, a manuscript was found at the palace of the Sultan Moustafa walad Sultan Bakhit tracing the origin of the Daju.
It states that the Daju came and ruled Darfur long ago from Yemen in 619 to 892 until 1212 AD then left Jabel Marra to Hajar Kadjano in 1417 to 1612 A.D.
The above dates suggest that they might have reached Dar Sila in 1613 to 1614 A.D. Chronology of the Sultans of Dar Sila began with one of Kaseforge's sons, Sultan Ahmed al-Daj.